I don't know who the Dutch mechanic was talking about but, the U.S. jet engine company I spent 39 years working for never bought one turbine blade casting or cast bladed turbine wheel from anywhere in India.
They were all cast in the United States.
That also goes for the turbine stator castings that are used in the hot section of the engines.
All of these turbine parts are made from very specialized alloys consisting of Nickle, Chromium, Cobalt, Molybdenum, Tungsten, Tantalum, Niobium, Aluminum and carbon. A few of them have traces of iron.
I mention this because many of these elements are difficult to get and the melting processes involved in creating the alloys is in itself an exacting science.
The casting processes involved in making these parts is also very specialized. Often the process is done in a vacuum or inert gas environment under precision controls to create things like directionally solidified blades.
Not that I don't think the Indian foundries couldn't make them but because the alloys are so specialized I don't think it would be profitable to even try to make them and compete with companies that have spent millions of dollars learning how to produce them.
For some names of these materials that might come in handy at a scrabble party when the conversations start to die, try, Astroloy, Waspaloy, Udimet 720, Hastelloy, Mar-M 247 DS and the old standby's, Inconel 738LC, 792 and 718.
Anyway, off of the high tech subjects and, back to the chains.